Finding the Fourth Proportional to 2,223.18, 3,333.06 and 990.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,223.18 : 3,333.06 = 990.18 : x
2. Step 2: Convert to fraction form
   2,223.18/3,333.06 = 990.18/x
3. Step 3: Cross multiply
   2,223.18x = 3,333.06 × 990.18
4. Step 4: Simplify right side
   2,223.18x = 3,300,329.35
5. Step 5: Solve for x
   x = 3,300,329.35/2,223.18
6. Step 6: Final answer
   x = 1,484.51